﻿#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

//跳台阶扩展问题
//https://www.nowcoder.com/questionTerminal/22243d016f6b47f2a6928b4313c85387
//class Solution { //平方问题
//public:
//    int jumpFloorII(int number) {
//        return pow(2, number - 1);
//    }
//};

//快到碗里来
//https://www.nowcoder.com/questionTerminal/82424d93369649b98720743c25edc6ce
//int main()
//{
//    const double PI = 3.14;
//    double n = 0;
//    double r = 0;
//    while (cin >> n >> r)
//    {
//        if (n <= 2 * PI * r)
//            cout << "Yes" << endl;
//        else
//            cout << "No" << endl;
//    }
//    return 0;
//}
